Andrey Smirnov | 06d7c13 | 2013-02-18 19:59:35 -0800 | [diff] [blame] | 1 | /* |
| 2 | * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips |
| 3 | * |
| 4 | * Copyright (C) 2012 Innovative Converged Devices(ICD) |
| 5 | * Copyright (C) 2013 Andrey Smirnov |
| 6 | * |
| 7 | * Author: Andrey Smirnov <andrew.smirnov@gmail.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; version 2 of the License. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | */ |
| 19 | |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 20 | #include <linux/module.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <sound/pcm.h> |
| 23 | #include <sound/pcm_params.h> |
| 24 | #include <sound/soc.h> |
| 25 | #include <sound/initval.h> |
| 26 | |
| 27 | #include <linux/i2c.h> |
| 28 | |
| 29 | #include <linux/mfd/si476x-core.h> |
| 30 | |
| 31 | enum si476x_audio_registers { |
| 32 | SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203, |
| 33 | SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202, |
| 34 | }; |
| 35 | |
| 36 | enum si476x_digital_io_output_format { |
| 37 | SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11, |
| 38 | SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8, |
| 39 | }; |
| 40 | |
| 41 | #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0b111 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \ |
| 42 | (0b111 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)) |
| 43 | #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0b1111110) |
| 44 | |
| 45 | enum si476x_daudio_formats { |
| 46 | SI476X_DAUDIO_MODE_I2S = (0x0 << 1), |
| 47 | SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1), |
| 48 | SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1), |
| 49 | SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1), |
| 50 | SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1), |
| 51 | |
| 52 | SI476X_DAUDIO_MODE_IB = (1 << 5), |
| 53 | SI476X_DAUDIO_MODE_IF = (1 << 6), |
| 54 | }; |
| 55 | |
| 56 | enum si476x_pcm_format { |
| 57 | SI476X_PCM_FORMAT_S8 = 2, |
| 58 | SI476X_PCM_FORMAT_S16_LE = 4, |
| 59 | SI476X_PCM_FORMAT_S20_3LE = 5, |
| 60 | SI476X_PCM_FORMAT_S24_LE = 6, |
| 61 | }; |
| 62 | |
| 63 | static unsigned int si476x_codec_read(struct snd_soc_codec *codec, |
| 64 | unsigned int reg) |
| 65 | { |
| 66 | int err; |
Andrey Smirnov | d686500 | 2013-02-18 19:59:34 -0800 | [diff] [blame] | 67 | unsigned int val; |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 68 | struct si476x_core *core = codec->control_data; |
| 69 | |
| 70 | si476x_core_lock(core); |
Andrey Smirnov | d686500 | 2013-02-18 19:59:34 -0800 | [diff] [blame] | 71 | if (!si476x_core_is_powered_up(core)) |
| 72 | regcache_cache_only(core->regmap, true); |
| 73 | |
| 74 | err = regmap_read(core->regmap, reg, &val); |
| 75 | |
| 76 | if (!si476x_core_is_powered_up(core)) |
| 77 | regcache_cache_only(core->regmap, false); |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 78 | si476x_core_unlock(core); |
| 79 | |
Andrey Smirnov | d686500 | 2013-02-18 19:59:34 -0800 | [diff] [blame] | 80 | if (err < 0) |
| 81 | return err; |
| 82 | |
| 83 | return val; |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | static int si476x_codec_write(struct snd_soc_codec *codec, |
| 87 | unsigned int reg, unsigned int val) |
| 88 | { |
| 89 | int err; |
| 90 | struct si476x_core *core = codec->control_data; |
| 91 | |
| 92 | si476x_core_lock(core); |
Andrey Smirnov | d686500 | 2013-02-18 19:59:34 -0800 | [diff] [blame] | 93 | if (!si476x_core_is_powered_up(core)) |
| 94 | regcache_cache_only(core->regmap, true); |
| 95 | |
| 96 | err = regmap_write(core->regmap, reg, val); |
| 97 | |
| 98 | if (!si476x_core_is_powered_up(core)) |
| 99 | regcache_cache_only(core->regmap, false); |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 100 | si476x_core_unlock(core); |
| 101 | |
| 102 | return err; |
| 103 | } |
| 104 | |
| 105 | static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai, |
| 106 | unsigned int fmt) |
| 107 | { |
| 108 | int err; |
| 109 | u16 format = 0; |
| 110 | |
| 111 | if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) |
| 112 | return -EINVAL; |
| 113 | |
| 114 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 115 | case SND_SOC_DAIFMT_DSP_A: |
| 116 | format |= SI476X_DAUDIO_MODE_DSP_A; |
| 117 | break; |
| 118 | case SND_SOC_DAIFMT_DSP_B: |
| 119 | format |= SI476X_DAUDIO_MODE_DSP_B; |
| 120 | break; |
| 121 | case SND_SOC_DAIFMT_I2S: |
| 122 | format |= SI476X_DAUDIO_MODE_I2S; |
| 123 | break; |
| 124 | case SND_SOC_DAIFMT_RIGHT_J: |
| 125 | format |= SI476X_DAUDIO_MODE_RIGHT_J; |
| 126 | break; |
| 127 | case SND_SOC_DAIFMT_LEFT_J: |
| 128 | format |= SI476X_DAUDIO_MODE_LEFT_J; |
| 129 | break; |
| 130 | default: |
| 131 | return -EINVAL; |
| 132 | } |
| 133 | |
| 134 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 135 | case SND_SOC_DAIFMT_DSP_A: |
| 136 | case SND_SOC_DAIFMT_DSP_B: |
| 137 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 138 | case SND_SOC_DAIFMT_NB_NF: |
| 139 | break; |
| 140 | case SND_SOC_DAIFMT_IB_NF: |
| 141 | format |= SI476X_DAUDIO_MODE_IB; |
| 142 | break; |
| 143 | default: |
| 144 | return -EINVAL; |
| 145 | } |
| 146 | break; |
| 147 | case SND_SOC_DAIFMT_I2S: |
| 148 | case SND_SOC_DAIFMT_RIGHT_J: |
| 149 | case SND_SOC_DAIFMT_LEFT_J: |
| 150 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 151 | case SND_SOC_DAIFMT_NB_NF: |
| 152 | break; |
| 153 | case SND_SOC_DAIFMT_IB_IF: |
| 154 | format |= SI476X_DAUDIO_MODE_IB | |
| 155 | SI476X_DAUDIO_MODE_IF; |
| 156 | break; |
| 157 | case SND_SOC_DAIFMT_IB_NF: |
| 158 | format |= SI476X_DAUDIO_MODE_IB; |
| 159 | break; |
| 160 | case SND_SOC_DAIFMT_NB_IF: |
| 161 | format |= SI476X_DAUDIO_MODE_IF; |
| 162 | break; |
| 163 | default: |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | break; |
| 167 | default: |
| 168 | return -EINVAL; |
| 169 | } |
| 170 | |
| 171 | err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, |
| 172 | SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK, |
| 173 | format); |
| 174 | if (err < 0) { |
| 175 | dev_err(codec_dai->codec->dev, "Failed to set output format\n"); |
| 176 | return err; |
| 177 | } |
Andrey Smirnov | 06d7c13 | 2013-02-18 19:59:35 -0800 | [diff] [blame] | 178 | |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int si476x_codec_hw_params(struct snd_pcm_substream *substream, |
| 183 | struct snd_pcm_hw_params *params, |
| 184 | struct snd_soc_dai *dai) |
| 185 | { |
| 186 | int rate, width, err; |
| 187 | |
| 188 | rate = params_rate(params); |
| 189 | if (rate < 32000 || rate > 48000) { |
| 190 | dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate); |
| 191 | return -EINVAL; |
| 192 | } |
| 193 | |
| 194 | switch (params_format(params)) { |
| 195 | case SNDRV_PCM_FORMAT_S8: |
| 196 | width = SI476X_PCM_FORMAT_S8; |
Axel Lin | 4e38b74 | 2012-10-31 16:07:43 +0800 | [diff] [blame] | 197 | break; |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 198 | case SNDRV_PCM_FORMAT_S16_LE: |
| 199 | width = SI476X_PCM_FORMAT_S16_LE; |
| 200 | break; |
| 201 | case SNDRV_PCM_FORMAT_S20_3LE: |
| 202 | width = SI476X_PCM_FORMAT_S20_3LE; |
| 203 | break; |
| 204 | case SNDRV_PCM_FORMAT_S24_LE: |
| 205 | width = SI476X_PCM_FORMAT_S24_LE; |
| 206 | break; |
| 207 | default: |
| 208 | return -EINVAL; |
| 209 | } |
| 210 | |
| 211 | err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE, |
| 212 | rate); |
| 213 | if (err < 0) { |
| 214 | dev_err(dai->codec->dev, "Failed to set sample rate\n"); |
| 215 | return err; |
| 216 | } |
| 217 | |
| 218 | err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, |
| 219 | SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK, |
Andrey Smirnov | 06d7c13 | 2013-02-18 19:59:35 -0800 | [diff] [blame] | 220 | (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 221 | (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)); |
| 222 | if (err < 0) { |
| 223 | dev_err(dai->codec->dev, "Failed to set output width\n"); |
| 224 | return err; |
| 225 | } |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int si476x_codec_probe(struct snd_soc_codec *codec) |
| 231 | { |
| 232 | codec->control_data = i2c_mfd_cell_to_core(codec->dev); |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | static struct snd_soc_dai_ops si476x_dai_ops = { |
| 237 | .hw_params = si476x_codec_hw_params, |
| 238 | .set_fmt = si476x_codec_set_dai_fmt, |
| 239 | }; |
| 240 | |
| 241 | static struct snd_soc_dai_driver si476x_dai = { |
| 242 | .name = "si476x-codec", |
| 243 | .capture = { |
| 244 | .stream_name = "Capture", |
| 245 | .channels_min = 2, |
| 246 | .channels_max = 2, |
| 247 | |
| 248 | .rates = SNDRV_PCM_RATE_32000 | |
| 249 | SNDRV_PCM_RATE_44100 | |
| 250 | SNDRV_PCM_RATE_48000, |
| 251 | .formats = SNDRV_PCM_FMTBIT_S8 | |
| 252 | SNDRV_PCM_FMTBIT_S16_LE | |
| 253 | SNDRV_PCM_FMTBIT_S20_3LE | |
| 254 | SNDRV_PCM_FMTBIT_S24_LE |
| 255 | }, |
| 256 | .ops = &si476x_dai_ops, |
| 257 | }; |
| 258 | |
| 259 | static struct snd_soc_codec_driver soc_codec_dev_si476x = { |
| 260 | .probe = si476x_codec_probe, |
| 261 | .read = si476x_codec_read, |
| 262 | .write = si476x_codec_write, |
| 263 | }; |
| 264 | |
Bill Pemberton | 7a79e94 | 2012-12-07 09:26:37 -0500 | [diff] [blame] | 265 | static int si476x_platform_probe(struct platform_device *pdev) |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 266 | { |
| 267 | return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x, |
| 268 | &si476x_dai, 1); |
| 269 | } |
| 270 | |
Bill Pemberton | 7a79e94 | 2012-12-07 09:26:37 -0500 | [diff] [blame] | 271 | static int si476x_platform_remove(struct platform_device *pdev) |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 272 | { |
| 273 | snd_soc_unregister_codec(&pdev->dev); |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | MODULE_ALIAS("platform:si476x-codec"); |
| 278 | |
| 279 | static struct platform_driver si476x_platform_driver = { |
| 280 | .driver = { |
| 281 | .name = "si476x-codec", |
| 282 | .owner = THIS_MODULE, |
| 283 | }, |
| 284 | .probe = si476x_platform_probe, |
Bill Pemberton | 7a79e94 | 2012-12-07 09:26:37 -0500 | [diff] [blame] | 285 | .remove = si476x_platform_remove, |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 286 | }; |
| 287 | module_platform_driver(si476x_platform_driver); |
| 288 | |
Andrey Smirnov | 06d7c13 | 2013-02-18 19:59:35 -0800 | [diff] [blame] | 289 | MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); |
Andrey Smirnov | 330345e | 2012-10-05 18:55:02 -0700 | [diff] [blame] | 290 | MODULE_DESCRIPTION("ASoC Si4761/64 codec driver"); |
| 291 | MODULE_LICENSE("GPL"); |